We are engaged in a continuing project that uses an imaging
Fabry-Perot spectrophotometer on the 3.6-m CFHT and the 4~m and 1.5~m
telescopes at CTIO to measure both absorption-line integrated-light
velocity maps for globular clusters and velocities for large samples
of cluster stars (Gebhardt, K., Pryor, C., Williams, T.B., \& Hesser,
J.E. 1994, AJ, 107, 2067; Gebhardt, et al. 1994, submitted). Our goals
are to study such kinematic properties as rotation and the number of
high-velocity stars, and to use the velocity dispersion profiles to
determine non-parametric mass profiles using the technique of Gebhardt
\& Fischer (1995, January AJ). Here we present radial velocities with
accuracies of 1--5 \kms\ for about 600 stars in the cusp cluster M15,
400 stars in the centrally-concentrated cluster M3, and 1900 stars in
the nearby cluster M4.

The M15 dataset contains three times more stellar velocities
throughout the whole cluster and five times more in the inner
10\arcsec\ than the previous study of Gebhardt \& Fischer. This
larger sample continues to show no evidence for a central cusp in the
velocity dispersion profile. The M4 data constitute one of the
largest radial velocity samples yet obtained for a globular cluster.
The stars in the sample range from magnitude V=10 to V=18.5. V=18.5
is 2.5 magnitudes below the main-sequence turn-off, so these data are
valuable first-epoch information for determining the main-sequence
binary fraction. We present two-dimensional velocity maps, velocity
dispersion profiles, and radial mass profiles for the three clusters.